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Primitive data type
- In the Standard Generalized Markup Language (SGML), an entity is a primitive data type, which associates a string with either a unique alias (such as a user-specified name) or an SGML reserved word (such as #DEFAULT).
en.wikipedia.org/wiki/SGML_entity
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In the Standard Generalized Markup Language (SGML), an entity is a primitive data type, which associates a string with either a unique alias (such as a user-specified name) or an SGML reserved word (such as #DEFAULT ). Entities are foundational to the organizational structure and definition of SGML documents.
May 11, 2023 · SGML provides a way of describing the relationships between these entities, elements, and attributes, and tells the computer how it can recognize the component parts of a document and it is based on the concept of a document being composed of a series of entities (object).
SGML is an international standard for the description of marked-up electronic text. More exactly, SGML is a metalanguage, that is, a means of formally describing a language, in this case, a markup language.
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Entities . Character entities are numeric or symbolic names for characters that may be included in an HTML document. They are useful when your authoring tools make it difficult or impossible to enter a character you may not enter often.
The document entity, subdocument entities, and text entities are collectively known as SGML entities. The document entity contains an SGML declaration, prolog, and a document instance; subdocument entities contain only a prolog and a document instance; and text entities only contain data and markup (which goes inside a document instance).
The SGML standard does not define SGML with formal data structures, such as parse trees; however, an SGML document is constructed of a rooted directed acyclic graph (RDAG) of physical storage units known as "entities", which is parsed into a RDAG of structural units known as "elements".
Aug 4, 2024 · The Standard Generalized Markup Language (SGML) is an ISO specification for defining declarative markup languages. On the web, HTML 4, XHTML, and XML are popular SGML-based languages. It is worth noting that since its fifth edition, HTML is no longer SGML-based and has its own parsing rules.
